my Ozeino headphones often stop talking to my Debian NUC system.
To fix, open a terminal on the linux box
elevate to sudo. perform the following while playing with the power/connect button on the headphones.
bluetoothctl scan onbluetoothctl pair 7c:4d:f0:25:85:89bluetoothctl connect 7c:4d:f0:25:85:89
if still no luck, then delete the device:
bluetoothctl remove 7c:4d:f0:25:85:89
bluetoothctl pair 7c:4d:f0:25:85:89